Pipe-threading device



(No Model.)

J. G. WILLIAMS.

PIPE THREADING DEVICE.

No. 441,223. Patented Nov. 25. 1890;

q lq'vE f E R JZzmes 6 52260972 JAMES C. \VILLIAIWIS, OF ERIE,PENNSYLVANIA.

PIPE-TH READING DEVICE.

SPECIFICATION forming part of Letters Patent No. 441,223, dated November25, 1890. Application filed June 30, 1890- Serial No. 857,263. (Nomodel.)

To ctZZ whom it may concern: v

Be it known that 1, JAMES C. WILLIAMS, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in AdjustablePipe-Threading Dies; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters of reference marked thereon, forming part of this specification.

My invention consists in the improvements in adjustable pipe-threadingdies hereinafter set forth and explained, and illustrated in theaccompanying drawings, in which Figure 1 is a perspective view of myimproved adjustable pipe-threading die. Fig. 2 shows a vertical centralsection of same. Fig. 3 shows a horizontal section of same,

Like letters refer to like parts in all of the figures.

In the construction shown in the drawings of my improved adjustablepipe-threading die, A is a circular shell or case provided with handlesB B for turning the same. Through the bottom of the case A is a centralopening 0, from which a sleeve D extends downward and is adapted toreceive a pipe guide E, which is secured in said sleeve D by means of athumb-screw cl. 'At one side of the case Aare thumb-screws F F,whichextend through the shell of the case, as and for the purpose set forth,and in the inside surface Cr of the shell A, I make vertical recesses HH H H, equidistant from each other, as and for the purpose hereinafterset forth. These recesses H, I preferably make semicircular in shape;but they may be made of other shapes, if desired.

WVithin the shell A, I place a cross-shaped die-holder I, the outer endsof the arms J of which are turned off, so that the die-holder I fits androtates freely in the case A. In the center of the die-holder I there isalso an opening K, through which the pipe to be 70, extending radiallyfrom the central opening K in said die-holder to the outer ends ofsaid'arms J, said slots being adapted toreceive and hold threading-diesL, the inner and cutting ends M of which dies extend into thepipe-opening K, and their outer ends on tending (when the dies L areradially at their greatest distance apart) into the central part of thesemicircular recesses II in the case A (this point being indicated tothe operator by a line b on the die-holder I coinciding with a like lineCL on the upper edge of the case A) and extending (when the dies areradially nearest together) against the inside G of the case A, thischange radially in the position of the dies L being accomplished by thepartial rotation of the die-holder I in the case A by means of thethumb-screwsF F contacting therewith, as illustrated by the dotted linesin Fig. 3 of the drawings.

To retain the die-holder I and the dies L mounted therein in place inthe case A, the case A is provided with a cover N, having a centralopening 0 therein corresponding to the opening K in the die holder I.This cover N is also provided with an openingPtherein, corresponding inlocation to the indicating mark a on the edge of the case A, and throughwhich opening P the operator may see whether or not the mark h on thedie-holder I coincides with the mark a on the case A without removingthe cover N. g This cover N, I preferably provide with an ear f and ahook g, a thumb-screw h, passing through the ear f into the case A, anda thumb-screw h in the case A, engaging the hook g at the opposite side,by means of which thumb-screws the cover N can be firmly clamped downupon the case A, or by loosening the said thumb-screws-the cover N canbe thrown back when desired for changing the threading dies or otherpurpose desired.

Having thus fully described my invention, its operation is so obviousthat further description thereof is deemed unnecessary. Therefore what Iclaim as new, and desire to secure by Letters Patent of the UnitedStates, 1s-= 1. The combination, in an adjustable pipethreading die, ofan outside shell or body having a circular recess therein and havingICC) curved or cam-shaped depressions in the inside surface of saidcircular recess adapted to receive the outer ends ofradially-movingthreading-dies, With a radially-slotted die-holderfitting into and capable of being rotated in said circular recess in theshell or body, and movable threading-dies in the radial slots in saiddie-holder, substantially as and for the purpose set forth.

2. The combination, in an adjustable pipethreading die, of an outsideshell or body having a circular recess therein and having curved orcam-shaped depressions in the inside surface of said circular recessadapted to receive the outer ends of radially-moving threading-dies, andoperating-handles on said shell or body, with a radially-slotted dieholder fitting into and capable of being r0- tated in said circularrecess in the shell or body, movable threading-dies in the radial slotsin said die-holder, and adjusting-screws passing through the shell orbody and engaging with the die-holder for adjusting the die movable capcovering said circular recess, and

the die-holder and dies therein, substantially as and for the purposeset forth.

in testimony Wh-ereofI aflix my signature in presence of two Witnesses.

JAMES C. WILLIAMS. Witnesses:

A. A. FREEMAN, WM. P. HAYES.

